Safety-valve for air-brakes.



PATENTED APR. 30, 1907.

T. SAFETY V ALVE FOR AIR BRAKES.

.BEHAN.

APYLIUATION FILED MAR.20.1906.

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h J M 24% L .n w M 0 a THOMAS BEHAN, F ALLIQUIPPA, PENNSYLVANIA.

SAFETY -VALVE FOR ASR"=BRAKES.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed March 20,1906. Serial No. 307.115.

T0 all w/wut i0 mag concern:

Be it known that I, THOMAS B enAN, a citizen of the United States ol America, residing at Alliquippa, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Safely- Velves for Air-Brakes, of which the following a specification, reference being had therein to the accompanying drawing.

m v V .ii'llS invention relates to certain new and useful improvements in air brake systems, and the invention relates more particularly "to a safety valve adapted to be used in conand automatically controlling the air passinginto the train pipes, should the hose between the train pipes burst or accidentally become disconnected during the operation ol' movement of the train.

The invention consists in the novel construction, combination and arrangement of parts to be hereinafter more fully described and claimed, and referring to the drawing accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which Figure 1, is a plan view, partly broken away and partly in section of an adaptation of my invention as applied to the train pipes and hose connections oi an air-brake system. Fig. 2, is a central longitudinal scctionalview thereof. Fig. 3, is a side elevation partly in section of one of the pipcscctions or anglecocks constructed in accordance with my invention, and Fig. 4, is a plan of one of the hose couplers, showing the hose attached thereto and partly broken away.

To put my invention into practice, I employ a section of pipe 1, the one end of which is bent downwardly at an angle, as at 2, and provided with interior screw'threads S and with a hose seat 4. The section of pipe 1 conforms substantially to an elongated angle cock, and the section is provided with a conventional. form of plug or cook 5, adapted to control the passage of air through said pipe.

I The pipe 1 is provided with a longitudinally disposed air passage or bore 6, which extends irom the angle end of the pipe 1 to the open- 1 lug which receives the valve 5. 1n the air passage or bore (5 is mounted a piston? carrying upon its one end a piston head 8, said head being of a conventional form having packing rings. The opposite end of the piston 7 is provided with a substantially U- 65 shaped head 9, said head being adapted to span and engage the angular end 10 of a lever 11 mounted upon the squared end. 12 of the plug or cock 5. The piston 7 is provided" with a longitudinally disposed groove 14 and engaging in said groove is a screw 15 carried by the pipe 1, said screw being adapted to act as a stop to limit the movement oi the piston within the air passage or bore 6, at the same time guide said piston therein. Engaging in the angular end 2 of the pipe 1 13 a nipple 115, said nipple having a tapering end 17, upon which a section of hose 18 is secured by a conventional form ofhose clamp 19. Surrounding the section of hose 18 is a section of hose 20, said section being of a larger diameter than the hose 18, thereby forming an annular passage way or space 2 1 between the sections of hose, said )assage way or space colnnumicating with the passag-c way or bore (3 of the pipe 1. The end of the hose 20 issccured upon the hose seat 4 by a conventional form of hose clamp 22.

One of the hose couplings which I employ in connection with my improved safety valve and mechanism is illustrated in Fig. i of the drawings, this coupling being of the ordinary type, with the exception that I provide its face 23 with an'auxiliary port 24, said port communicating by a port 25 with the annular space or passage way 21, formed between the sections of hose 18 and 20. The pipe sections 1 constituting the angle-cocks are suitably-connected to the respective sections ofthc train lino pipe 26 as shown.

3 in operation, the air of one train line has direct passage through the hose 16 and the section of pipe 1 to another train line, when connections are established between two cars. Should the hose 16 burst, the air entering the annular passage way or space 21 will immediately pass into the assagc wow or bore 6, force the pi ton heat. 8 outwaiclv causing the head 9 oi' the piston to strike the angular end 10 oi the lever 11 of the plug valve 5, rotating said valve and shutting oh the air of l the train pipes. The ordinary plugvalves or sorted to Without departing cocks Will also be used in connection withthe tion.

I do not care to confine myself to the type of valve embodied Within the pipe 1 orto the 7 minor details of construction.

Such changes in the construction and operation of my improved system, as are per missible by the appended claims, may be reand scope of the invention. What I claim and desire to secure by Let ters Patent, is

. 1. In a coupling for air brake-systems, the combination with two train pipe sections, angle pipe sections connected to the adjacent ends of the train pipe sections, a plug valve in the assage-way of each angle pipe section, a each angle pipe section, pistons in said auxiliary passage Ways having their rods extending 'outside the angle pipe sections and provided with heads, levers carried by said plug valves and engaged by said head of the piston rods, and sections of hose mounted one Within the other connecting said coupling members with the angle ipe sectionshaving the space between the ose in'communicatending outside the auxiliary passage-Way, a

from the spirit.

ongitudinal auxiliary passage-Way in.

angle ipe sections connected to the adj acent, 5 5

end 0 the train pipe sections, a valve in each angle ipe section, an auxiliary passage Wa in eacli anglcpipe section, a piston in eac auxiliary passage Way having one end exu shaped head on said end, a lever on the valve engaged by said head, coupling members, coupling pipes connecting said coupling members with the angle pipe sections and air tight pipes surrounding the coupling pipes.

3. A train pipe safety device, com rising an--angle pipe section, a plug valve t erein, an auxiliary passage Way'm the pipe section, a piston therein having one end extending outside the passage Way, a U.-shaped head on said outer end engaging said lever and a stop carried by the angle pipe section en aging in a groove in the piston and limiting t e travel of said piston in said auxiliary passage way.

In testimony whereof I afiix my signature 5 5 THOMAS BEHAN. Witnesses:

K. H. BUTLER, E. E. POTTER.

in the presence of tWo Witnesses. 

